From 778634f778a029476fb85463462848c0341f8e6b Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Fri, 27 Dec 2019 16:02:07 +0900
Subject: [PATCH] Drop an invalid char as UTF-8

---
 lib/reline/line_editor.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/reline/line_editor.rb b/lib/reline/line_editor.rb
index 75af50a908..3f6d7817db 100644
--- a/lib/reline/line_editor.rb
+++ b/lib/reline/line_editor.rb
@@ -1091,6 +1091,11 @@ class Reline::LineEditor
 
   private def ed_insert(key)
     if key.instance_of?(String)
+      begin
+        key.encode(Encoding::UTF_8)
+      rescue Encoding::UndefinedConversionError
+        return
+      end
       width = Reline::Unicode.get_mbchar_width(key)
       if @cursor == @cursor_max
         @line += key
@@ -1101,6 +1106,11 @@ class Reline::LineEditor
       @cursor += width
       @cursor_max += width
     else
+      begin
+        key.chr.encode(Encoding::UTF_8)
+      rescue Encoding::UndefinedConversionError
+        return
+      end
       if @cursor == @cursor_max
         @line += key.chr
       else